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6 November 2018 Fabrication of double-periodic graded photonic crystal array
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We propose a multi-fiber holographic interferometry for fabricate double-periodic Graded Photonic Crystal (GPC) structures over large areas. This experimental system consists of an ultraviolet laser, Single-Mode Optical Fiber Splitters (SMOFS), fiber holder and focus lens. This method simplifies the system configuration by leaving out the spatial light modulator. Holographic GPC structures have been designed by using multi-fiber interference in this paper. The interference pattern is controlled by the number and position of the beams. The simulation results show that the gradient trend in the interference graph can be accurately adjusted through the above method. Experiment results were obtained and recorded for multi-fiber interfering system. The simulated interference patterns are verified experimentally through a microscopic camera. A good consistence has been observed between the theoretical and experimental results. This proposed method is possible to develop a new technique for fabrication of GPC lens or lens array.
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YongLe Qi, XiaoHong Sun, and Shuai Wang "Fabrication of double-periodic graded photonic crystal array", Proc. SPIE 10818, Holography, Diffractive Optics, and Applications VIII, 108182A (6 November 2018);

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